The 4 chapters in Deltarune are similar to the major areas in Undertale, but in reverse order. Here are the parallels i could think of. There are probably way more, feel free to discuss.

**Chapter 1 - New Home:**  
\- kingdom - medieval  
\- king that has gone mad  
\- A friendly goat character is relevant  
\- A 4th wall breaking superboss that has gone mad with power

**Chapter 2 - The Core:**  
\- A heavy focus on machinery, cyberspace/computers  
\- similar color scheme, green text on signs  
\- a QUEEN as a boss  
\- Metatton EX body - Spamton EX body (both ending with TON)

**Chapter 3 - Hotlands:**  
\- Watercoolers!  
\- A tv character hosting the show, taking over the flow of the journey.   
\- Mettaton wearing the same suit as tenna  
\- Cooking minigame, musical scene.  
\- hot area (desert in the game)  
\- tv-quiz setting

**Chapter 4 - Waterfall:**  
\- literal waterfalls  
\- similar colorschemes  
\- main antagonist constantly dropping you down to lower areas, silently toying with you  
\- huge lore drops through text and characters  
\- big focus on overworld challenges (spears, climbing)  
\- character focused on justice with ponytail and ''of justice'' weapon, same music leitmotifs.

This all just clicked for me. I might be going mad. If you have any more ideas about this, share them in the comments. Hopefully, this all makes sense!



Deltarune is Undertale backwards.